Statistics and experimental psychology are very difficult in psychology courses. The most authoritative psychological statistics textbook in China is Zhang Houcan's Modern Psychological and Educational Statistics, which is difficult to understand because it involves many principles and formulas of mathematical statistics. Actually, these don't need to be read carefully. As long as we know the applicable scope of various statistical analysis methods, we can learn them by combining the chapter of experimental design of experimental psychology and the related contents of psychometrics. The counseling books edited by Jin include Statistical Analysis of Modern Psychology and Pedagogy and answers after class. You can buy one for comparison.